Stereo Installation
There have been four locations for the stereo chronicled on this forum over the years.
The starboard settee would be an easy installation with easy access to running wires.  It places the stereo slightly low for easy operation.

The galley cabinet forward or aft are not too difficult.  It should be mounted as near to the sink as possible to avoid disrupting the use of the galley cabinet.  Though I mounted mine aft, I wouldn't do so if  had large knobs as they will take abuse from accessing the ice chest.  The aft is slightly more friendly to making adjustments from the cockpit and viewing the dial in general but has gotten bumped occasionally when working around the galley.  Fore or aft is about a 50/50 deal.  I didn't go forward simply because I had a suction cup type storage for detergent, sponge etc. mounted in that area and it wouldn' remount to the aft location because it protruded too far.




An overhead installation would really be neat.... especially in a nice wood drop down cabinet with storage for a few CD's. Mounting over the table makes great sense in many ways but has one drawback.  If the boat is used for cruising, there are times during foul weather that it might obstruct the view when under autopilot and below. This may not be true for the wing.  An overhead installation would be more difficult to run wires.

If a cutout is made in the fiberglass.... liberally mask off the area of the installation.  Use a Marks-a-lot and draw the necessary cut out from either a supplied template or make a template and trial fit.  While a jig saw can be used, it cuts on the upstroke and even with the masking tape, may peel gel coat away from the cut slightly.  If the stereo has very little lip, I suggest using one of the tools that holds a hacksaw blade and insert so that the cut is on the forward stroke.  Drill a series of holes to get opening for cutting the various sides and finish those small areas with a file.

Speakers have been mounted
Some find that cabin speakers are adequate, while others like to have both interior and exterior speakers.  Some have mounted a kill switch for cockpit speakers in one of the coaming box.  I'm guessing that this is a double pole double throw switch that switches between the speakers and/or a load resister matching the impedance/resistance of the speakers.

I have only interior speakers and find them marginally adequate.  When I use the stereo when motoring, I usually sit with my feet dangling into the cabin and steer with the autopilot otherwise the volume level required sitting in the cockpit,  nears the distortion zone.  

Any modification in a boat requires careful thought as to consequences, remember speakers can interfere with compasses a fare distance, in part my reason for not installing cockpit speakers as I have both a pedestal compass and a fluxgate for the auto pilot.